package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;
import java.util.List;
import java.util.function.Consumer;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {

    @Pointcut("execution(* com.sky.mapper.*.*(..))&& @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut() {
    }

    @Before("autoFillPointCut()")
    public void autoFillAspect(JoinPoint joinPoint) {
        log.info("实现字段自动填充");
//        获取到当前被拦截的方法上的数据库操作类型
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        AutoFill annotation = signature.getMethod().getAnnotation(AutoFill.class);
        OperationType value = annotation.value();
//        获取到当前被拦截的方法的参数-- 实体对象
        Object[] args = joinPoint.getArgs();
        if (args == null || args.length == 0) {
            return;
        }
        Object arg = args[0];
//                准备赋值的数据


//        根据当前不同的操作类型，为对应的属性通过反射来赋值
        if (value == OperationType.INSERT) {
            try {
                if (arg instanceof List) {
                    List list = (List) arg;
                    list.forEach(o -> {
                        setTimeArg(o);
                    });
                } else {
                    setTimeArg(arg);
                }


            } catch (Exception e) {
                throw new RuntimeException(e);
            }

        } else if (value == OperationType.UPDATE) {
            try {
                LocalDateTime now = LocalDateTime.now();
                Long currentId = BaseContext.getCurrentId();
                Method setUpdateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setUpdateTime.invoke(arg, now);
                setUpdateUser.invoke(arg, currentId);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }


        }
    }


    private void setTimeArg(Object arg) {
        try {

            LocalDateTime now = LocalDateTime.now();
            Long currentId = BaseContext.getCurrentId();

            Method setCreateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
            Method setCreateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
            Method setUpdateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
            Method setUpdateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

            setCreateTime.invoke(arg, now);
            setCreateUser.invoke(arg, currentId);
            setUpdateTime.invoke(arg, now);
            setUpdateUser.invoke(arg, currentId);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}
